At 7:15, the Garden State Parkway is backed up northbound from south of Exit 136/Stiles Street in Clark to Exit 140/Route 22 in Union. It’s a four-mile delay due to delays on Route 22.

Traffic on eastbound Route 22 had already begun backing up in parts of Springfield, Union and Hillside as of 6:30, due to the fog. But Route 78E in the same area is moving well, as are Routes 28 and 82 (Morris Avenue).

With the ground still colder than the air, and the air full of moisture, the fog is likely to be with us through rush hour this morning. Temperatures, 40F at 7:30 a.m. at Newark Airport, are expected to rise to about 60F by midday. Forecasters said rain is likely today — and heavy showers are certain tonight. What time they start could affect the homeward rush hour.More Union County news: NJ.com/Union • Twitter